JP3401178B2 - Optical connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector, and more particularly to an optical connector having a backplane housing which is assembled by sandwiching the backplane from both front and back sides with a housing body and a fixed part.

[0002]

2. Description of the Related Art As a plug-in type optical connector, a so-called backplane connector has been conventionally provided. FIG. 11 shows an example of a backplane connector. In FIG. 11, reference numeral 1 is a plug-in unit, 2 is a print board, 3 is a back plane, 4a and 4b are MPO connector plugs (hereinafter referred to as "MPO plugs"), 5 is a print board housing, and 6 is a back plane housing. In this backplane connector, by inserting the printed board 2 to which the printed board housing 5 is fixed into the plug-in unit 1, the printed board housing 5 is attached to the backplane housing 6 attached to the backplane 3 arranged on the side of the plug-in unit 1. Are fitted and assembled. The mated printed board housing 5 and backplane housing 6 constitute an optical connector adapter 7, and the MPO plug 4 inserted from both sides.
Connect a and 4b. Print board housing 5
MPO plug 4 to be inserted into the optical connector adapter 7 from the side
"a" is previously inserted into the print board housing 5, and the print board 2 is inserted into the back plane housing 6 at the same time when the print board 2 is inserted to a predetermined position of the plug-in unit 1. The housing body 8 is an inner housing 8a
Is provided inside, and the MPO plug 4b on the backplane housing 6 side is supported in the internal housing 8a.
Since a plurality of printed boards 2 can be accommodated in parallel in the plug-in unit 1 in high density, the optical connector adapter 7 can be mounted in high density in this backplane connector. The MPO plugs 4a and 4b are optical connectors having a structure in which an optical connector ferrule 4c established in JIS C 5981 is supported by a plastic housing.

FIG. 12 is an exploded perspective view showing the backplane housing 6. As shown in FIG. 12, the backplane housing 6 includes a housing body 8 and a back housing 9 that are arranged opposite to each other with the backplane 3 in between. The housing body 8 is arranged on the printed board 2 side (left side in FIG. 12), and the back housing 9 is arranged on the opposite side of the housing body 8 with the backplane 3 interposed therebetween. A pin 10 is projectingly provided on the housing body 8, and the pin 10 is inserted into a mounting hole 11 opened in the backplane 3 so as to project to the opposite side of the backplane 3.
The back housing 9 is fixed to the projecting tip of 0 with a screw 12.

FIG. 13 shows an example of the mounting hole 11. FIG.
As shown in FIG. 5, the mounting hole 11 has a rectangular shape and has expansion portions 13 at four corners. The pin 10 is housed in a pair of expansion portions 13 and 13 facing each other along the diagonal line of the mounting hole 11, and a = 1.60 in the vertical direction (vertical direction in FIG. 13).
A gap 14 of about mm is secured, and a gap 15 of about b = 0.34 mm is secured in the horizontal direction (left and right in FIG. 13). Since the backplane 3 is slidably sandwiched between the housing body 8 and the back housing 9, the backplane housing 6 has pins 10, 10 in the gaps 14, 15 respectively.
It can float within the movable range of. As a result, as shown in FIG. 11, the dimensional intersection when the printed board housing 5 is fitted to the backplane housing 6 is absorbed by the floating of the backplane housing 6 to improve the fitting workability. In the backplane connector, the floating of the backplane housing 6 is important, and various configurations other than the expansion portion 13 of the mounting hole 11 can be adopted as the configuration for allowing the floating of the backplane housing 6. Is.

[0005]

In the case of the above-mentioned optical connector, the printed board housing 5 is currently fixed to the printed board 2 by using a special small screw (not shown). There was a problem that the cost of the screw was high. That is, in view of increasing the mounting density of the printed board 2 in the plug-in unit 1, this screw uses a special small product in order to suppress the protruding size from the printed board 2, resulting in high cost. . Moreover, since the size of the screw is small, the rotating work is troublesome and the workability cannot be improved. In addition, the tool for rotating the screw is also a special product, which also causes a cost increase. Since this screw is screwed into a screw hole formed in the print board housing 5 and fixed, a screw hole of a special size is also formed in the print board housing 5, and there is also a problem that it takes time and effort to form the screw hole. Occurs. Further, when the large MPO plug 4a having a large number of corresponding cores is supported on the print board housing 5, the size of the print board housing 5 becomes large, and the print board housing 5 is fitted into or removed from the backplane housing 6. In this case, the resistance force is increased, and the number of fixing screws is increased in order to stabilize the fixed state of the printed board housing 5 with respect to the printed board 2, and the problems of the cost and the fixing workability become more remarkable. Become.

The present invention has been made in view of the above-mentioned problems, and (1) the use of the rivet component improves the workability of fixing the print board housing to the print board. (2) The rivet component is configured. By adjusting the shape of the rivet body, rivet pin, etc., it is possible to obtain high versatility with respect to the thickness of the printed board and the shape of the printed board housing. (3) The rivet parts made of synthetic resin It is an object of the present invention to provide an optical connector that can easily obtain the effects and can be manufactured at low cost.

[0007]

According to the invention of claim 1,
Is a backplane housing (20) assembled by sandwiching the backplane with a housing main body (21) and fixing parts (22) that are arranged opposite to each other on the front and back sides of the backplane (3), and with respect to the backplane. A print board housing (40, 4) that is attached to a print board (2) that can be moved back and forth and that is detachably fitted to the housing body.
And an optical connector inserted into the housing body through a mounting hole (30) opened in the backplane by fitting the printed board housing to the housing body forming the backplane housing. An optical connector in which a plug (4b) and another optical connector plug (4a) supported by the printed board housing are connected to each other, a rivet hole (46, 46a, 46) penetrating the printed board.
b) and the rivet holes (47, 48a, 48b) formed in the printed board housing, the rivet parts (4
5, 49, 50) are communicated with each other to deform the end portion of the rivet component, whereby the printed board and the print board housing are fixed, and the end portion of the rivet component is fixed to the rivet component. The optical connector is characterized in that it is deformed in a space provided between two planes including both end surfaces of the print boat housing in the axial direction, and the optical connector is a means for solving the above problems.
In this optical connector, the workability is improved by fixing the print board housing to the print board by the rivet parts. That is, since the fixing work using the rivet component is performed only by deforming and fixing the end portion of the rivet component communicating with the print board and the print board housing, the work is simple as compared with the conventional fixing by screwing. . Moreover, the rivet hole formed in the print board housing is for inserting the rivet component, and is easier to form than the screw hole for screwing the print board housing. Further, the rivet component can reduce the projecting dimension from the print board or the print board housing, and can increase the mounting density of the print board housing in the plug-in unit. Various configurations can be adopted as the rivet parts applied to this optical connector, for example, a rivet part consisting of one part can also be adopted.

For example, as described in claim 2 , the rivet component includes a tubular rivet body which is communicated with the rivet hole of the print board and the rivet hole of the print board housing, and one axial end portion of the rivet body. And a rivet pin that is deformed from a deformed portion formed at the other axial end of the rivet body to push the rivet body outwardly by adjusting the amount of pushing into the other axial end of the rivet body. The print board and the print board housing are sandwiched and fixed between a locking projection protruding from one axial end of the rivet body and the deformed portion deformed by the rivet pin. With this configuration, simply inserting the rivet pin into the rivet body and deforming the deformable part will make it easier to fix. Work can be performed, the workability is further improved. Moreover, with this rivet component, high versatility can be obtained with respect to the thickness of the printed board and the shape of the printed board housing simply by adjusting the shapes of the rivet body and the rivet pin. The improvement in versatility contributes to cost reduction. After connecting the rivet body with the rivet pin inserted in advance to the rivet hole of the printed board and the rivet hole of the printed board housing, the deformed portion of the rivet body is deformed by adjusting the pushing amount of the rivet pin. A configuration can also be adopted.

Further, when the rivet part to adopt a structure made of a synthetic resin, for molding the rivet part is easy, easy rivets parts conforming shape against the rivet holes formed on the printed board or a printed board housing In addition to being highly versatile with respect to the thickness of the printed board and the shape of the printed board housing, it also enables the use of inexpensive materials and contributes to cost reduction.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The first optical connector of the present invention will be described below.
An embodiment will be described with reference to FIGS. 1 to 8. In the figure, the same components as those in FIGS. 11 to 13 are designated by the same reference numerals to simplify the description.

As shown in FIG. 1, the optical connector of this embodiment comprises a backplane housing 20 mounted on a backplane 3 and a printed board housing 40 mounted on a printed board 2, and the printed board 2 is plugged in. The printed board housing 40 is fitted to the backplane housing 20 by being inserted into the unit 1 (see FIG. 11). In this optical connector, the printed board housing 40 in which the MPO plug 4a has been fitted in advance is fitted in the backplane housing 20, and at the same time, the MPO plug 4 is fitted.
The a is positioned at a predetermined position in the backplane housing 20, and is connected to the MPO plug 4b inserted into the backplane housing 20 from the opposite side.

First, an example of the backplane housing 20 applied to this optical connector will be described. As shown in FIG. 1, the housing body 21 is formed of a synthetic resin such as plastic into a cylindrical shape, and has a plug storage hole 23 for storing the MPO plug 4b inserted from a mounting hole 30 opened in the backplane 3 so that the MPO plug 4b can be inserted and removed. I have it. An optical connector plug 43 (described later) supported by the printed board housing 40 is inserted from the opposite side of the plug housing hole 23. M in the plug hole 23
Since a key groove (not shown) for positioning the PO plug 4b is formed, the MP inserted in the plug housing hole 23
The O plug 4b is positioned so that it can be butt-connected to the optical connector plug 43.

FIG. 2 shows an example of a fixed part. Fixed part 2
The whole body 2 is formed of a spring material and has a rectangular frame-shaped main body 2
4 and a pair of elastic claws 2 projecting from both sides of the main body 24
5 and 25 are provided. The protruding positions of the elastic claws 25, 25 coincide with the pair of engaging portions 26, 26 (see FIG. 1) formed on both sides of the housing body 21 facing each other.
Further, engaging claws 27 are projected from the tips of the elastic claws 25. In FIG. 1, the elastic claws 25, 25 are inserted into the mounting holes 30 of the backplane 3, and the engaging portions 26 of the housing body 21 installed on the opposite side through the backplane 3
26 and are engaged with each other.

As shown in FIG. 3, the mounting hole 30 is rectangular and extends vertically above and below the backplane 3.
The outer shape of the main body portion 24 of the fixed component 22 is larger than the mounting hole 30, and the plug insertion hole 29 opened in the central portion of the main body portion 24 is smaller than the mounting hole 30. As shown in FIG. 1, when the elastic claws 25, 25 are inserted into the mounting holes 30 of the backplane 3 and engaged with the engaging portions 26, 26 of the housing body 21,
The plug insertion hole 29 communicates with the mounting hole 30, and the MPO plug 4b inserted from the plug insertion hole 29 into the mounting hole 30 can be inserted into the housing body 21.

Further, as shown in FIG. 3, a clearance is secured around the elastic claws 25, 25 inserted into the mounting hole 30, and the elastic claws 25, 25 are displaced within the mounting hole 30 within the clearance. Tolerate. Therefore, the backplane housing 20 attached to the backplane 3
In addition, the elastic claws 25 are allowed to float within the movable range of the mounting hole 30. For example, as shown in FIG. 4, the clearance is c = in the horizontal direction (left and right in FIG. 4).
0.34 mm, d = 1.60 in the vertical direction (upper and lower in FIG. 4)
mm, and the elastic claws 25, 2 within this clearance range
5 is displaceable and the floating range of the backplane housing 20 is set. Accordingly, when the print board 2 is inserted into the plug-in unit 1 (see FIG. 11) and the print board housing 40 (see FIG. 1) is fitted into the back plane housing 20, the print board housing 40 and the back plane housing 20 are separated from each other. Since the positional deviation between the two can be absorbed by the floating of the backplane housing 20, the fitting workability is improved.

As shown in FIG. 2, spring portions 31, 31 are formed in the body portion 24 on both sides of the plug insertion hole 29.
In FIG. 2, the spring portion 31 is a curved portion that protrudes from the main body portion 24 in the direction of the backplane 3, and as shown in FIG. 5, when the elastic claws 25 are inserted into the mounting holes 30, they are brought into contact with the backplane 3. It Therefore, the elastic claws 25, 2
When 5 is inserted into the mounting hole 30 and engaged with the housing body 21, the backplane 3 is sandwiched between the housing body 21 and the spring portion 31. In the assembled backplane housing 20, the backplane 3 is lightly sandwiched between the housing body 21 and the body portion 24 by a clamp force that is slidable. Then, the spring portion 31
Since the tolerance of the thickness of the backplane 3 is absorbed within the elastic deformation range of, the mounting state of the housing body 21 is stable, and the desired floating range due to the clearance shown in FIG. Since it is stably obtained, the workability of fitting with the print board housing 40 can be improved. The shape of the spring portion is not limited to the curved portion shown in the drawing, and various shapes such as a bent portion can be adopted.

In FIG. 1, the printed board housing 40 is entirely made of synthetic resin such as plastic, and the backplane housing 2 assembled on the backplane 3 is shown.
It is adapted to be detachably fitted to the housing body 21 of No. 0.

FIG. 6 is a perspective view showing the print board housing 40. In FIG. 6, a pair of engaging / disengaging claws 41a, 41b that engages with the housing body 21 (see FIG. 1) so as to be disengageable from the outside is provided to project from both sides (upper and lower sides in FIG. 6) of the print board housing 40. ing. Further, as shown in FIG. 6, a cylindrical storage wall 42 is provided inside the print board housing 40. The MPO plug 4a is inserted into and fitted into the storage wall 42 from the rear (the left back side in FIG. 6). In addition, the backplane housing 20 of the printed board housing 40
A stacking wall 43 is provided at the front end in the insertion direction (the right front side in FIG. 6). As shown by the arrow in FIG. 1, the printed board housing 40 is attached to the backplane housing 2
0, the overlapping wall 43 is inserted into an insertion groove (not shown) provided in a gap between the housing body 21 and the inner housing 21a housed in the housing body 21, and the print board housing 40 is inserted into the backplane. It is positioned with respect to the housing 20. At this time, the overlapping wall 43 overlaps the outer surface of the inner housing 21a to reinforce the inner housing 21a and the housing body 21. Print board housing 40
To the backplane housing 20 and insert the storage wall 42 of the printed board housing 40 into the inner housing 2
When brought into contact with 1a, the tip of the MPO plug 4a housed and supported in the printed board housing 40 (inside the housing wall 42) is inserted into a predetermined position in the housing body 21, and the opposite side (mounting hole 30 side) to the housing body 21. It is connected to the MPO plug 4b inserted from.

As shown in FIG. 1, the MPO plug 4a is
When inserted in the print board housing 40, the coupling 4d engages with the print board housing 40 in a detachable manner. Also, the MPO plug 4a is the coupling 4
It is also possible to pull out from the print board housing 40 by the pulling out operation of d. MPO plug 4b
Is also releasably engaged with the backplane housing 20 by the coupling 4d.

As shown in FIG. 7, a key groove 44 is formed in the storage wall 42 of the printed board housing 40, and the key 4e (see FIG. 1) of the MPO plug 4a is engaged with the key groove 44. As a result, the MPO plug 4a is positioned at a predetermined position in the print board housing 40. As shown in FIG. 1, the backplane housing 20
The MPO plug 4b on the side also has a key 4e, and this key 4e
Is engaged with a key groove (not shown) in the inner housing 21a, so that it is positioned at a predetermined position in the backplane housing 20. Then, when the printed board housing 40 is fitted into the backplane housing 20, the MPO plugs 4a and 4b are positioned, and the optical connector ferrule 4 of these MPO plugs 4a and 4b is positioned.
c and 4c are butt-connected to each other. In addition, reference numeral 44a in FIG. 7 denotes an engagement / disengagement claw that is disengageably engaged with the MPO plug 4a.

The MPO plugs 4a, 4b have a built-in urging means (not shown) such as a coil spring for urging the optical connector ferrule 4c.
When they are connected to each other, the urging force of these urging means acts as a butting force between the optical connector ferrules 4c and 4c. At this time, since the fitting force between the backplane housing 20 and the printed board housing 40 acts as a reaction force of the urging means, the abutting force can be efficiently applied between the optical connector ferrules 4c and 4c that are abutted and connected. it can.

As shown in FIG. 6, the print board housing 40 is fixed to the print board 2 by a rivet component 45. In FIG. 6, the rivet component 45 comprises a tubular rivet body 45a made of synthetic resin such as plastic, and a synthetic resin rivet pin 45b inserted into the rivet component 45a. As shown in FIG. 8, the rivet component 45 has a rivet body 45a inserted into a rivet hole 47 of the printboard housing 40 from a rivet hole 46 opened in the printboard 2 and a rivet body 45a.
After reaching the deformation space 40a inside 0, the rivet pin 45b press-fitted into the rivet body 45a from the printed board 2 side (one end in the axial direction of the rivet body 45a) deforms the other end of the rivet body 45a in the axial direction. Part 45c
Are radially expanded outwardly and deformed, so that the printed board housing 40 and the print are formed between the locking projection 45f (flange portion) protruding from one axial end of the rivet body 45a and the deforming portion 45c. Fix it so that it sandwiches the board 2.

Specifically, first, the rivet body 45a is inserted from the deforming portion 45c into the rivet hole 46 of the printed board 2 to insert the rivet hole 4 of the printed board housing 40.
7, the deformation portion 45c reaches the deformation space 40a, and the locking protrusion 45f is locked to the printed board 2. At this time, the printed board housing 40
Engaging flange 40b projecting around the rivet hole 46 of
Is fitted into the rivet hole 46 of the printed board 2, the communication between the rivet holes 46 and 47 on the printed board housing 40 side and the printed board 2 side is maintained, and the work of inserting the rivet body 45a is easy. Next, when the rivet pin 45b is press-fitted into the rivet body 45a, the projection 45d protruding on the inner surface side of the deforming portion 45c in the deforming space 40a is pressed by the rivet pin 45b, and is deformed into a plurality of pieces by the slit. Part 45
Each part of c is radially pushed outwards. As a result, the deformable portion 45c becomes the printed board housing 40.
And the printed board 2 and the printed board housing 40 between the locking protrusion 45f and the deformable portion 45c.
It is fixed so that and are sandwiched. The rivet pin 45b may be inserted into the rivet body 45a in advance, the rivet body 45a may be communicated with the rivet holes 46 and 47, and then the pushing amount of the rivet pin 45b toward the print board housing 40 may be increased. And the print board housing 40 can be fixed. At this time, at the work site, since the rivet component 45a in which the rivet pin 45b is inserted may be handled as one component, the fixing workability is improved. In addition,
The material of the rivet component 45 is not limited to resin, the range of selection of materials is wide, and it is easy to reduce the cost by using inexpensive materials.

Therefore, in this optical connector, since the rivet component 45 fixes the print board housing 40 to the print board 2, the rivet body 45a.
The fixing work can be easily performed only by the inserting work and the press-fitting work of the rivet pin 45b, and the work efficiency is significantly improved as compared with the case of using the conventional screw. Further, in the conventional fixing by screws, it is difficult to reduce the cost because the screws are special products, and the processing of the printed board housing 40 is also special, which hinders the reduction of the cost of the entire optical connector. If the rivet component 45 is used for fixing, it is easy to reduce the cost of the rivet component 45 itself, and since the processing of the printed board housing 40 is simple, the cost of the entire optical connector can be reduced.
Moreover, the rivet component 45 can be easily adapted to the plate thickness of the printed board 2 simply by changing the length dimensions of the rivet body 45a and the rivet pin 45b. High versatility is obtained as compared with the case where the pitch and the like need to be changed.

A second embodiment of the present invention will be described below with reference to FIGS. 9 and 10. 9 and 10 show a printed board housing 48 having a total of four rivet holes 48a, 48b. As shown in FIG. 9, a total of four rivet holes 46a and 46b are also formed in the printed board 2. An engagement flange 48c is provided around the opening of the rivet hole 48a so that the engagement flange 48c fits into the rivet hole 46a of the printed board 2 to move the printed board housing 48 into the printed board 2.
Can be positioned at a predetermined position.

As shown in FIG. 10, rivet holes 46a,
The rivet part 49 applied to 48a is the rivet hole 4
Cylindrical rivet body 49 communicated with 6a and 48a
a and a rivet pin 49b press-fitted into the rivet body 49a from the print board 2 side (one end in the axial direction of the rivet body 49a). The rivet body 49
The deforming portion 49c formed at the other end of the a in the axial direction of the rivet is inside the deforming space 48d (expanding portion) in which the end of the rivet hole 48a opposite to the engaging flange 48c is expanded. The pin 49b is deformed so as to push it outwards, so that the printed board housing 48
The printed board 2 and the printed board 2 are fixed by being sandwiched between the rivet parts 49.

The rivet hole 48b passes through a bearing flange 48e which is provided so as to project from the printed board housing 48 to the rear side (left side in FIG. 10). Rivet holes 46b, 48
The rivet part 50 applied to b is a rivet hole 46b,
It is provided with a tubular rivet body 50a communicating with 48b and a rivet pin 50b press-fitted into the rivet body 50a. Then, the deformed portion 50c which is inserted from the printed board 2 side and protrudes through the rivet hole 48b of the bearing flange 48e is deformed by being spread outward by the rivet pin 50b press-fitted into the rivet body 50a. Allows printed board housing 4
8 and the printed board 2 are fixed by being sandwiched by the rivet parts 50.

Here, as shown in FIG. 9, the rivet hole 4
8b has a larger diameter than the rivet hole 48a, and the rivet component 50 applied to the rivet holes 46b and 48b has a larger outer diameter than the rivet component 49 applied to the rivet holes 46a and 48a. Also, the rivet holes 46b, 4
The rivet part 50 applied to 8b has a rivet hole 46
The length dimension is also larger than that of the rivet component 49 applied to a and 48a. In this way, the rivet parts 49, 50 are
The diameter dimension and the length dimension are appropriately changed according to the shape of the rivet holes 48a and 48b. Changing the diameter and length with a conventional special screw takes time and effort to form the thread groove, but rivet parts 49 and 50 can be easily handled by simply molding the rivet parts 49 and 50 into the desired shape. It is possible to obtain high versatility, and it is possible to reduce the cost. Moreover, when screws are used, it is necessary to change the screw holes formed on the print board housing 48 side in accordance with the screw shape. Rivet holes 48a, 48 for inserting rivet parts 49, 50
Since it is only necessary to form b, it is easy to improve the manufacturing efficiency of the printed board housing 48.

Further, the bearing flange 48e can be formed at a position other than the rear portion of the printed board housing 48, and is applied to, for example, a rivet hole of the bearing flange projecting at a plurality of positions of the printed board housing 48. It is also possible to attach the print board housing 48 to the print board 2 only by the rivet parts. In this case, since the rivet hole penetrating the inside of the print board housing 48 is unnecessary, the design of the print board housing 48 becomes easy. Also, when forming a rivet hole on the bearing flange, it is easy to align the rivet hole shape, and rivet parts of the same size can be used, so rivet hole machining efficiency and rivet part manufacturing efficiency are improved. It is possible to improve the cost and further reduce the cost. As described above, the print board housing 48 is fixed to the print board 2 by using the rivet component as long as the rivet hole is formed in the bearing flange protruding from the print board housing 48 or the inside of the print board housing 48. It is possible to obtain high versatility.

In the optical connector to which the printed board housing 48 is applied, since the fixing force of the printed board housing 48 to the printed board 2 can be sufficiently secured, the work of fitting or detaching the printed board housing 48 and the backplane housing 20 is performed. Even when the resistance force generated at the time of is large, there is no concern that the print board housing 48 is displaced. Therefore, for example, when a large size printed board housing or backplane housing is used to connect a large size MPO plug with a large number of corresponding cores, it is necessary to perform fitting or disengagement work. The printed board housing can be stably supported in place even when a large resistance force is expected to occur.
Work such as connection and disconnection of MPO plugs can be performed smoothly.

The formation position, size, number and the like of the rivet hole of the print board and the rivet hole of the print board housing, the shape of the deformation space for deforming the deformed portion of the rivet, and the like are the same as those in the above-described embodiment. Needless to say, the present invention is not limited to the one shown in FIG.
For example, the printed board housing and the backplane housing applied to the optical connector of the present invention are not limited to the above-described embodiments, and may be JIS C 59.
81 optical connector ferrules that are not established in 81, configurations that support optical connector plugs such as simple MPO plugs, etc.
Various configurations can be adopted.

[0032]

As described above, according to the optical connector of the first aspect , (a) the rivet component is used to fix the printed board to the printed board housing, so that only the rivet is deformed. The fixing work can be done easily in a short time and the workability is improved. (B) By using rivet parts, it is sufficient to form rivet holes in the printed board housing, and it is necessary to process screw holes etc. Since there is no problem, the manufacturing efficiency of the printed board housing can be improved and the cost can be reduced.

According to the optical connector of claim 2 ,
(C) High versatility with respect to the thickness of the printed board and the shape of the printed board housing can be obtained simply by adjusting the shape of the rivet body, rivet pin, etc. that make up the rivet component. (D) General purpose of (b) above By changing the deformation amount of the rivet body by adjusting the pushing amount of the rivet pin inserted in the rivet body that connects the (e) print board and print board housing The printed board housing can be easily fixed to the board, and the fixing work is further simplified, which is an excellent effect.

Further , (f) the rivet parts are made of synthetic resin.
By doing so , it is possible to further improve the versatility of the rivet component, reduce the cost, (g) use inexpensive materials, and further reduce the cost of the rivet component. Produce the effect.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of an optical connector of the present invention and is a front view showing the vicinity of a backplane housing and a printed board housing.

FIG. 2 is a perspective view showing a fixing component adopted in the backplane housing of FIG.

3 is a front view showing a mounting hole for mounting the backplane housing of FIG. 1. FIG.

FIG. 4 is a front view showing a clearance secured around an elastic claw in the mounting hole of FIG.

5 is a front cross-sectional view showing a backplane housing used in the optical connector of FIG.

6 is a perspective view showing a printed board housing of the optical connector of FIG. 1. FIG.

7 is a side view of the print board housing of FIG. 6 viewed from the overlapping wall side.

8 is a plan view showing how the print board housing of FIG. 6 is attached to a print board.

FIG. 9 is a view showing a second embodiment of the optical connector of the present invention and is a perspective view showing a printed board housing having four rivet holes.

FIG. 10 is a plan view showing how the print board housing of FIG. 9 is attached to a print board.

FIG. 11 is an exploded perspective view showing a conventional backplane connector.

FIG. 12 is an exploded perspective view showing a backplane housing of the backplane connector of FIG.

13 is a front view showing a mounting hole of the backplane connector of FIG.

[Explanation of symbols]

2 ... Printed board, 3 ... Backplane, 4a ... Optical connector plug (MPO plug), 4b ... Optical connector plug (MPO plug), 20 ... Backplane housing, 21 ... Housing body, 22 ... Fixing part, 30 ... Mounting hole , 40 ... Print board housing, 45 ... Rivet parts, 45a ... Rivet body, 45b ... Rivet pin, 45c ... Deformation part, 45f ... Locking protrusion (flange part), 46, 46a, 46b ... Print board rivet hole, 47 , 48a, 48b ... Rivet holes in print board housing, 48 ... Print board housing, 4
9 ... Rivet parts, 49a ... Rivet body, 49b ... Rivet pins, 49c ... Deformation part, 500 ... Rivet parts,
50a ... Rivet body, 50b ... Rivet pin, 50c
… Deformed part.

─────────────────────────────────────────────────── ─── Continued Front Page (72) Yoshikazu Nomura, Yoshikazu Nomura, 1440 Rokuzaki, Sakura City, Chiba Prefecture Fujikura Sakura Factory, Ltd. (72) Inventor Masaaki Takaya, 3-19-3 Nishishinjuku, Shinjuku-ku, Tokyo Telephone Co., Ltd. (72) Inventor Shinji Nagasawa 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corp. (56) Bibliography Sho 55-35446 (JP, Y1) Yukio Hayashi, Hiroshi Furukawa, Yoshikazu Nomura, Development of back-panel type multi-fiber optical connector, Proceedings of IEICE Communications Society Conference, Japan, The Institute of Electronics, Information and Communication Engineers, August 30, 1996, 1996 / Society B2, 481 Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02B 6/38 JISST file (JOIS)

Claims (2)

(57) [Claims] 1. A housing main body (21) and a fixed part (2) which are arranged opposite to each other on both front and back sides of a backplane (3).
A backplane housing (20) assembled by sandwiching the backplane by 2);
A printed board housing (40, 48) that is attached to a printed board (2) that can be moved back and forth with respect to the backplane and that is removably fitted to the housing body to form the backplane housing. By fitting the printed board housing to the housing body, the optical connector plug (4b) inserted into the housing body through the mounting hole (30) opened in the backplane and the printed board housing are supported. Another optical connector plug (4
In an optical connector adapted to be connected to a), a rivet hole (46, 46
a, 46b) and the rivet holes (47, 48a, 48b) formed in the printed board housing by communicating the rivet parts (45, 49, 50) with each other to deform the ends of the rivet parts. The print board and the print board housing are fixed, and the end of the rivet component is in a space provided between two planes including both end faces of the print boat housing in the axial direction of the rivet component. An optical connector characterized by being deformed by. 2. The tubular rivet body (45a, 49) communicating with the rivet hole of the printed board and the rivet hole of the printed board housing.
a, 50a) and an axial end of the rivet body, and the amount of pushing into the other axial end of the rivet body is adjusted to form the other axial end of the rivet body. Rivet pins (45b, 4b) that deform the deforming portions (45c, 49c, 50c) and push them outward.
9b, 50b) between the locking protrusion (45f) protruding from one axial end of the rivet body and the deformed portion deformed by the rivet pin, the printed board and the printed board. The optical connector according to claim 1, wherein the housing is sandwiched and fixed.